Intro and MFI question

[rory gallagher]

Hello All
I've been here for years but only an occasional visitor.
I have a 1970 914 6 since 1983 and a '69 S that needs a restoration, no, neither is for sale.
I do all maintenance and modifications myself except for machine work and paint.
Here's the question.
Can 2.2l MFI and a 3.0l be modified to make the combination work ?
I own the complete 2.2 MFI system and the '81 SC 3.0 engine.
I know the basics. 1.Compatible distributor or alternate ignition system.
2.Drive sprocket on the 1-3 cyl cam, pulley for MFI on crank.
3. Machine heads for injectors.
4. Replace space cam with one suitable(?) for this engine. Rebuild pump.
5. Suitable pistons.
6. Suitable cams.
7. Modify stacks for this application.
The engine is going in a conversion 914 6.
Yes, I'm aware of modern ITB systems but love MFI and want to evaluate this possibility first.
I have MFI protractors and tools.
What am I missing ?
Is my idea crazy ?
TIA
Rory

[drwhosc]

I am not sure you are going to be able to get the bore of the intakes wide enough to handle the air needed for the 3.0 engine. Might be better to look for an engine or an intake that can support what you have. Porsche did a good job matching the intakes to the cases, and there was not that much room to make it better.

You also need to modify the MFI pump to get the right amount of fuel in there. That can be quite $$.

I know there was a 3.0L RSR motor, so it is possible to get an MFI system to work, but it is not going to be easy.

[Rusty]

Roy, if you have a 2.2L S system I think things get better for you. Call Henry at Supertec, he may have better options for throttle bodies that would match up with your 3.0. I'm going through a similar issue with a 3.0, but staying with Webers,
but your approach would my my first choice barring financial barriers.
Good luck,

[91133]

Hi Rory,

Here is a good resource on your proposition.

I'm looking at a similar deal with a '76 3.0 Carrera engine and '69S 005 MFI system - close to yours but not quite.

http://forums.pelicanparts.com/porsc...on-thread.html

Cheers,
Mark

[Mr9146]

Hello All
I've been here for years but only an occasional visitor.
I have a 1970 914 6 since 1983 and a '69 S that needs a restoration, no, neither is for sale.
I do all maintenance and modifications myself except for machine work and paint.
Here's the question.
Can 2.2l MFI and a 3.0l be modified to make the combination work ?
I own the complete 2.2 MFI system and the '81 SC 3.0 engine.
I know the basics. 1.Compatible distributor or alternate ignition system.
2.Drive sprocket on the 1-3 cyl cam, pulley for MFI on crank.
3. Machine heads for injectors.
4. Replace space cam with one suitable(?) for this engine. Rebuild pump.
5. Suitable pistons.
6. Suitable cams.
7. Modify stacks for this application.
The engine is going in a conversion 914 6.
Yes, I'm aware of modern ITB systems but love MFI and want to evaluate this possibility first.
I have MFI protractors and tools.
What am I missing ?
Is my idea crazy ?
TIA
Rory

Been there. Done that. it was fun.

What's your question? It sounds like you have all the answers...

[RSTarga]

Back in the day, I had the opportunity to drive a 3.0 RS. Its an experience that is still burned into my memory, fabulous engine!
Even at 7200ft altitude it had really great performance. Very tractable on the street, just like the 2.7 RS.
The 917 brakes were awesome too.

[Richy]

It would be easier (cheaper ) if you started with a 2.4 liter pump . Much easier to switch to an RS space cam . Yes , a 3.0 RS is definitely a memorable drive , I had the pleasure 2 years ago .

[rory gallagher]

Thank you all for your responses.
What I gather is that a 2.4 setup would be a better starting point.
I'll pose the the equation (with the 2.2 equip.) to the MFI specialists.
The bottom line is whether the pump and the stacks can be modified to suit the engine.
I hope it's possible.

[Mr9146]

Thank you all for your responses.
What I gather is that a 2.4 setup would be a better starting point.
I'll pose the the equation (with the 2.3 equip.) to the MFI specialists.
The bottom line is whether the pump and the stacks can be modified to suit the engine.
I hope it's possible.

The answer is yes. You can modify the 2.0L and 2.2L MFI parts to work on your motor.